Milling cnc not accurate

I have a problem with my milling machine because it is not accurate

Below is the part I'm making to test my machine.

 


I have a difference of -0.6 mm / 0.023622 in on the X axis
                                   -0.3 mm / 0.011811 in on the Y axis
                                   -0.1 mm / 0.00393701 in on the Z axis

no excess thickness on my program

I tested with a probe the 3 axes, and about the same location as the machining of my part when I jog 1 mm I have 1mm and I jog 5 mm I have 5mm. the problem is that I have a backlash of 0.05mm (wear of the screw).

for me my PID is good.

This is the 3rd piece I have tested and I have the same dimensions.

 

You can use backlash compensation for each axis/joint, see if that improves something.
Add to each joint in ini file:
backlash = 0.05
Or whatever that joint needs, and also add
Backlsh_velocity = 10
That value is units per second, so 10 is 600mm/m for metric or 600 inches/m for imperial ... that would be to much